• FoafSites

These FOAF Sites are open social networking sites which host a large amount of 'Friend of a Friend' FOAF data. Typically, they generate it automatically for all users. If you know of sites not on the list, please add them.

Key to columns:

Example

An actual URI of a person. * An asterisk means there is no URI for the person themselves, only for their FOAF file.

People

Approximate number of people (and therefore of FOAF files) if known.

Links out

Yes/No. In your profile, you can enter the URI of a FOAF identity you have on 'another' site.

OpenID Integration

Yes/No.

• Is there a foaf:openid value that gives the URI of the (X)HTML page used for OpenID authentication? The Inverse Functional nature of the foaf:openid property enables use of my OpenID on par with my Personal URI via an inference-capable RDF User Agent (e.g., a SPARQL Processor).

• In addition, but not mutually exclusive to the prior usage scenario, can a single URI be used as a conduit to both FOAF file and OpenID authentication page? Example: http://myopenlink.net/dataspace/person/kidehen is a URI that both provides OpenID authentication and exposes a FOAF file.
  
  Thus, these two SPARQL statements would return the same results:
  
     SELECT DISTINCT * WHERE { <http://myopenlink.net/dataspace/person/kidehen> ?p ?o } 
  
  and
  
     SELECT DISTINCT * WHERE { <http://myopenlink.net/dataspace/person/kidehen#this> ?p ?o } 

Sites which no longer offer FOAF, or whose FOAF is not easily discoverable

Updates welcome. I tried registering with most of these sites, to see if their FOAF was just members-only, and still found no joy.

See also

• FoafOpenid - Using FOAF trust networks to block blog spam

• List of open social networking sites by Jen Golbeck. Great list, though not a wiki

• OpenSocial directory - List of FOAF Containers

Note: A better way to make this page would be to make it in the data wiki and mash it up here as a table.